the thing about doctor/river is that the blatant romance is a defense mechanism. it’s playacting it’s how they sketch out the boundaries of their relationship because they can never be sure of how the scales of intimacy are balanced - they love each other, sure, but they are so rarely in a place where they both know enough about each other for mutual trust. so you get these really interesting juxtapositions like how eleven is in full flirty mode for impossible astronaut/day of the moon to the point where it feels like they’re about to make out every time they’re in the same frame but at the same time he dismisses her with “trust you? seriously?” and is shocked when she actually kisses him goodbye. in let’s kill hitler they flirt like hell when she is literally trying to murder him but not at all when they save each others’ lives. in the wedding of river song kovarian complains about them being lovey-dovey in front of her but right after that the doctor attempts to reset the timeline and river has to drag him kicking and screaming into respecting her enough to tell her the truth. in angels take manhattan we get both “just you wait till my husband gets home” (flaunting their relationship to grayle) and “never let him see the damage” (she doesn’t trust him to love her as a flawed, mortal person). they’re out of sync all the time, so sincerity is off the table except when it’s a necessary shortcut to trust that doesn’t exist yet - river whispering his name to him in the library when he doesn’t know her yet, their literal wedding being a tool the doctor uses to convince her to let him “die.”
the thing about “hide the damage” in particular is that river was responding to the doctor’s own fear of seeing the damage. she lied to him because she was trying to give him what he wanted, even if he couldn’t admit it. and it applies both to the broken wrist and to their relationship in general. every time he looks at her all he can see is the pain of her death, and she can see that he’s holding back even if she doesn’t exactly know why. this was always going to be a barrier to true intimacy between them unless they could be linear for long enough to know and see each other as they are, not as they’re going to be or as they were.
that’s why husbands of river song is such a perfect resolution for them. the only way river would ever be honest enough to let him see her insecurities is if she didn’t know who he was, so it had to be twelve and not eleven. and it specifically had to be twelve fresh from losing his memories of clara, so that he’d stop running away from confronting her death and just give them those 24 years together on darillium to really get to know each other, to see the ugliness and the imperfections and stay together anyway. it makes perfect sense that after that they could reach the level of love and trust river has for “her doctor” in the library, in a way that just isn’t possible with a relationship built on whirlwind dates done out of order and nothing else.
the doctor's moral compass is so funny to me bc they're like 'NO i hate guns i am so moral dont you DARE even THINK about shooting the murderous alien that is trying to brutally kill ur whole family' straight off committing some sort of horrific mass murder and locking 50 people in an eternal state of mental and physical anguish and being like Ah yes another day another slay 👍